送交者: steven 于 2005-4-15, 07:57:07:
回答: laugh track也是根据现场录音加的 由 方舟子 于 2005-4-15, 06:04:02:
in the year 1950. Most of the laugh tracks at that time were canned, faking laugh with banging empty cans. Later, when live audiences were introduced to the recording, real laugh started get into the laugh track.